[vfio-users] Z170X IOMMU Groups

[Rich Mingin (vfio-users)]

Well, I'd been considering getting a Z170 setup, if I do, I now know what
vendor. Kudos indeed.

On Thu, Sep 22, 2016 at 2:55 PM, Alex Williamson <
alex.l.williamson at gmail.com> wrote:

> On Thu, Sep 22, 2016 at 12:47 PM, Nick Sarnie <commendsarnex at gmail.com>
> wrote:
>
>> Hi again,
>>
>> Very much to my surprise, Gigabyte replied and sent me a fixed BIOS. The
>> new IOMMU groups (with ACS override patch kernel commandline removed for
>> this boot), as well as my lspci information are below. I see four messages
>> the following messages in dmesg now:
>>
>> [    0.523892] pci 0000:00:1c.0: Intel SPT PCH root port ACS workaround
>> enabled
>> [    0.524031] pci 0000:00:1c.4: Intel SPT PCH root port ACS workaround
>> enabled
>> [    0.524159] pci 0000:00:1c.5: Intel SPT PCH root port ACS workaround
>> enabled
>> [    0.524292] pci 0000:00:1d.0: Intel SPT PCH root port ACS workaround
>> enabled
>>
>>
>> IOMMU Groups: http://pastebin.com/raw/0dcHk8Xk
>> lspci: http://pastebin.com/raw/1zAZuPBM
>>
>> Alex, please let me know if they missed anything else, so I can report it
>> to them.
>>
>
> :-O
>
> /me picks jaw off the ground
>
> Kudos to Gigabyte!
>
> So we now have:
>
>  100: 01 00 01 14
>
> 0x14010001 = ID 0x0001 (AER), version 0x1, next 0x140
>
> 140: 0d 00 01 22
>
> 0x2201000d = ID 0x000d (ACS), version 0x1, next 0x220
>
> 220: 19 00 01 00
>
> 0x00010019 = ID 0x0019 (Secondary PCIe), version 0x1, next 0x0
>
> So they've just added ACS into the chain, perfect.  Thanks,
>
> Alex
>
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